Aiichirō Fujiyama (藤山 愛一郎, Fujiyama Aiichirō, May 22, 1897 – February 22, 1985) was a Japanese politician of the Liberal Democratic Party and business executive.

[1] A business executive who symbolized "big business" in Japan as president of Dai Nippon Sugar Manufacturing Co. and executive officer of Nitto Chemical Industry Co., he used his influence to bring about the fall of Prime Minister Hideki Tōjō in 1944.

In 1955 and 1956, Fujiyama, who was Chairman of the Japan Chamber of Commerce at the time, strongly supported Nobusuke Kishi as a successor to Ichirō Hatoyama to the President of the Liberal Democratic Party, according to a report by the Central Intelligence Agency.

As Foreign Minister in the cabinet of Prime Minister Nobusuke Kishi (1957–60), he headed Japan's first delegation to the United Nations (1957), helped revise the U.S.–Japan Security Treaty (1960), and promoted the restoration of diplomatic relations between Japan and China.

He also served in the cabinet of Kishi's successor Hayato Ikeda as Director of Japan's Economic Planning Agency.